Effect of Inhomogeneity Parameters on Wave Propagation in Cementitious Material

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Title: Effect of Inhomogeneity Parameters on Wave Propagation in Cementitious Material

Author(s): Dimitrios G. Aggelis and Tomoki Shiotani

Publication: Materials Journal

Volume: 105

Issue: 2

Appears on pages(s): 187-193

Keywords: frequency; mortar; nondestructive testing; pulse velocity.

DOI: 10.14359/19763

Date: 3/1/2008

Abstract:
In this study, the relationship between inhomogeneity in cementitious material and stress wave parameters is investigated by measuring parameters of through transmission measurements of ultrasonic waves. Except from the inherent inhomogeneity of this type of material, the presence of damage in the form of cracks can lead to even more highlighted velocity dispersion and attenuation phenomena for specific bands of frequencies. Therefore, different contents of crack-like, film-shaped particles are included during casting of concrete to evaluate the contribution of distributed damage in the observed wave parameters. Experiments are carried out using low- and high-frequency sensors with the range of frequencies also covering those used for in-place application.


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